Hair foil



FIG. 1 is a top view of a hair foil showing my new design;

FIG. 2 is a bottom view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is an end view thereof;

FIG. 6 is an end view thereof; and,

FIG. 7 is a top perspective view thereof.

The broken lines in the drawings illustrate a fold line and form no part of the claimed design. 

CLAIM The ornamental design for a hair foil, as shown and described. 